Simplification (Railway Maths) (401 to 450)

Total Questions: 50

31. (√2 + √3)(√2 - √3) is equal to: [RRB NTPC 19/01/2021 (Evening)]

Correct Answer: (c) -1
Solution:

32. The value of √8 + √18 is: [RRB NTPC 19/01/2021 (Evening)]

Correct Answer: (c) 5√2
Solution:

√8 + √18 → 2√2 + 3√2 = 5√2

33. Solve the following: [RRB NTPC 20/01/2021 (Evening)]

(√3 - √2) × (√3 + √2) = ?

Correct Answer: (d) 1
Solution:

(√3 - √2) × (√3 + √2)
= (√3)² - (√2)² = 3 - 2 = 1

34. Simplify the following. [RRB NTPC 21/01/2021 (Morning)]

Correct Answer: (a)
Solution:

35. What is the value of [RRB NTPC 21/01/2021 (Morning)]

Correct Answer: (b) 3
Solution:

36. The value of [RRB NTPC 21/01/2021 (Morning)]

Correct Answer: (a)
Solution:

37. What is the value of the following expression ? [RRB NTPC 21/01/2021 (Morning)]

Correct Answer: (b) -40
Solution:

38. Find the value of: [RRB NTPC 21/01/2021 (Evening)]

Correct Answer: (d) 60
Solution:

39. If 7⁸⁄₉ is converted into a mixed fraction and its numerator is 70 + x, then the value of x is: [RRB NTPC 21/01/2021 (Evening)]

Correct Answer: (a) 1 
Solution:

40. 200 g as a fraction of 1 kg is: [RRB NTPC 21/01/2021 (Evening)]

Correct Answer: (a) 2/5 
Solution: